Selective Chemical Vapor Deposition Growth of WS2/MoS2 Vertical and Lateral Heterostructures on Gold Foils.
Authors
Wang, Zixuan
Xu, Wenshuo
Li, Benxuan
Hao, Qiaoyan
Wu, Di
Qi, Dianyu
Gan, Haibo
Xie, Junpeng
Hong, Guo
Zhang, Wenjing
Publication Date
2022-05-16Journal Title
Nanomaterials (Basel)
ISSN
2079-4991
Publisher
MDPI AG
Volume
12
Issue
10
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Wang, Z., Xu, W., Li, B., Hao, Q., Wu, D., Qi, D., Gan, H., et al. (2022). Selective Chemical Vapor Deposition Growth of WS2/MoS2 Vertical and Lateral Heterostructures on Gold Foils.. Nanomaterials (Basel), 12 (10) https://doi.org/10.3390/nano12101696
Abstract
Vertical and lateral heterostructures consisting of atomically layered two-dimensional (2D) materials exhibit intriguing properties, such as efficient charge/energy transfer, high photoresponsivity, and enhanced photocatalytic activities. However, the controlled fabrication of vertical or lateral heterojunctions on metal substrates remains challenging. Herein, we report a facile and controllable method for selective growth of WS2/MoS2 vertical or lateral heterojunctions on polycrystalline gold (Au) foil by tuning the gas flow rate of hydrogen (H2). We find that lateral growth is favored without H2, whereas vertical growth mode can be switched on by introducing 8-10 sccm H2. In addition, the areal coverage of the WS2/MoS2 vertical heterostructures is tunable in the range of 12-25%. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) results demonstrate the quality and absence of cross-contamination of the as-grown heterostructures. Furthermore, we investigate the effects of the H2 flow rate on the morphology of the heterostructures. These pave the way to develop unprecedented 2D heterostructures towards applications in (opto)electronic devices.
Keywords
chemical vapor deposition, 2D materials, heterostructures, selective growth
Sponsorship
the research fund of University of Macau, Macau SAR (File no. MYRG2018-00079-IAPME, MYRG2019-00115-IAPME) (File no. MYRG2018-00079-IAPME, MYRG2019-00115-IAPME, File no. 081/2017/A2, 0059/2018/A2, 009/2017/AMJ, Grant no. JCYJ20200109105422876, Grant no. 2020ZDZX3041, Grant no. KQTD2016053112042971)
Identifiers
External DOI: https://doi.org/10.3390/nano12101696
This record's URL: https://www.repository.cam.ac.uk/handle/1810/337297
Rights
Licence:
https://creativecommons.org/licenses/by/4.0/
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